Malicious PDF — malware analysis report

Static analysis result for SHA-256 f380f58f0e06ea1a…

MALICIOUS

PDF

76.6 KB Created: 2021-01-08 18:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 27757fd47435d9c698198cccd5041d73 SHA-1: e7f184127bea35dc2a6a7fd194243b4c7d651f03 SHA-256: f380f58f0e06ea1a7a0f87989b9322909d5ddc5473a72ccc0cd5cfc68a8c1dc9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/aws?utm_term=java+8+update+201+32+bit'. This URL is likely used to deliver a malicious payload or phish for credentials by impersonating a software update. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF document strongly suggests a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/aws?utm_term=java+8+update+201+32+bit In PDF document text
    • https://cdn.sqhk.co/jakufomego/hh8giD2/earth_3d_live_wallpaper_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/bhd1cj2/download_game_cooking_master_fever_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/48228839797.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/reading_articles_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/didusumuvan.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/58835391358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2738873b-284e-433b-a44a-57a38014141a/notre_dame_marching_band_covid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e91d1700-a7d3-47b6-8f2c-3c7df644f317/music_party_video_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/819b41fa-d95b-464f-bb72-455df6951bdc/practice_makes_perfect_english_conversation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bccaa45-dcb8-45f2-b943-eeed459b67b1/judaxavukin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc3651e-4b73-4a65-9349-55b607b669ff/dimatemepe.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD115 5184 bytes
SHA-256: d40dfc3742e96a8bcc901e60431b6a04243f35b5b10bd7c34e1ef3145e88e032
font_01_sfnt_off0000e2b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B2 5776 bytes
SHA-256: 98f9e054bd9aa6eef91b8e44c05c52bd5fef7b3b22c3b80ef4b48c5839c527d2
font_02_sfnt_off0000f128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF128 10748 bytes
SHA-256: 0d2e0168df65f4c29490d130c1a80c3248af477bc7f74e9c5c2452c64cc3e046
font_03_sfnt_off000115d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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